Pump



Aug. 15, 1933. H. A, WEICHHART 1,922,721

PUMP

Filed Dec. l0, 1930 /Z A TTORNEYS. .ma 22B/M28 Patented Aug. 15, 1933 UNITI-IDv STATES r PUMP Henry A. Weichhart, Alameda, Calif.

Application December 10, 1936 serial No. 501,318

11 (ci. 1oz-153) y This invention relates to pumps and especially to a plunger type of pump particularly intendedl for removing small quantities of gasoline, lubricating oil andthe like from flve gallon cans, small barrels and like containers.

The object of the present invention is to generally improve and simplify the construction and operation of pumps of the character described; to provide a pump which discharges .during the down stroke of the pump; to provide a pump employing two spacedy concentric tubes, the inner tube containing the plunger and functioning as` the pump cylinder and the outer tube functioning as a discharge passage; to provide an upwardly turned discharge spout to prevent drip; to provide an adjustable cone shaped sleeve adapted to fit openings of different diameter and con tainers of varying depth; to provide an extension sleeve to insure complete removal of `the entire contents of tanks or cans; to provide meansy for draining the pump after use; and further to provide a novel valve mechanism wherebyv the oil is directed into the pump cylinder during the suction stroke and then into the discharge passage during the reverse or discharge stroke. One form ofthe pump structure is shown by Wayof illustration in the accompanyingl drawing in which- Fig. 1 is a central vertical longitudinal section of the pump; l

Fig. 2 is a cross section taken online 2-2 of Fig. 1;

Fig. 3 is a cross section taken on line 3--3 of Fis. 1;

Fig. 4 is a vertical longitudinal sectional view of the lower end of the pump showing the sleeve valve in depressed position;

Fig. 5 is a perspective view of the sleeve valve in section;

Fig. 6 is a detail view of the lower end of the pump cylinder showing the draining sleeve ap-` plied thereto;

Fig. 'I is a detail view showing the lower of the pump cylinder.

Referring to the drawing in detail and particularly Figure 1, A indicates an inner tube which in this instance, functions as the pump cylinder.. Mounted on the upper endof this tube is a screw cap 3 and a packing disc p 4 and extending through the cap and disc is a rod 5 on the upper end of which is formed a handle 6. Secured to the lower end ofthe rod is, a piston or plunger 7 and mounted on top thereof and surrounding the piston rod is the helical spring 8 and a sliding collar 9. The piston employed is of standard construction, that is, an ordinary cup tween the lower end of the sleeve valve and an lend l leather is employed and this issecured by washers `and clamping nuts, such as indicated at 10. The

stroke of the rod and plunger is cushioned in an upward direction by the collar 9 and spring 8 while the strokel in the downward direction is 0 limited by a cross pin 11. The lower end of the tube A which forms the cylinder of the pump, is shown in Figures l, 4 and 7. It is open at the lower end and a plurality of'discharge openings 12 are formed a short distance above the opening. o5 These openings will hereinafter be referred to as discharge ports and the loweropen end of the cylinder as the intake port.

Surrounding the pump cylinder .and extending substantially from end to end thereof is an ex- 7 terior tube B. 'Ihis is spaced from the inner cylinder to form an annular discharge passage 13.- The upper end of the tube B is secured to the upper end of the pump cylinder by an annular collar 14 which is soldered or otherwise secured 75 to form a tight joint. The upper end of the tube is also provided with a discharge spout 15. This spout is turned in an upward direction, this being important, as it prevents dripping after the pump has been in use. That is, any. liquid 30 remaining in the spout will drain back into the annular discharge passage 13 from where it will be removed, as hereinafter will be described.

Suitably secured in the lower end of thetube B is a sleeve 16 and formed in this sleeve are a plurality of drain slots 17. Slidably mounted on the lower end of the pump cylinder and within the sleeve 16 is a sleeve valve 18 which functions to cover and uncover the discharge ports l2. This sleeve valve is also provided with an annular seat 19 at its lower end which supports a check ball or valve 20 and it is also provided with an annular portion 18a which forms a guide and seat for a spring 21, this spring beinginterposed beannular ange 22 secured on the lower most end .of the sleeve 16. The spring 2l normally retains the sleeve valve 18 in the position shown in Figure 1 where the ports 12 are closed but it is also adapted to assume a depressed position as shown in Figure 4, during the discharge stroke of the pump, as will hereinafterbe described. The sleeve valve in reality is a combination sleeve valve and check valve as it does not only control'the ports 12 but itv also forms a support for the check valve 20. i

Before describing the operation of the pump it will be stated that the outer tube B is provided with a cone shaped sleeve 25 which terminates in an annular head member 26. The cone shaped sleeve and head member 26 ts the outer tube B 110 snugly but is vertically slidable thereon, its function beingas followsz-rst, that of permitting the pump to t openings of different diameter and secondly to permit the pump to be attached to tanks of varying depth. It should also be noted that the lower end of the sleeve 16 is provided with an extension tube 27 and that this tube is notched at the lower end, as indicated at 28.

In actual operation, if the pump is applied to a.` five gallon can containing lubricating oil or the like, it is only necessary to remove the screw cap of the can and then insert the pump. Sleeve 25 will during insertion of the pump, enter the screw cap opening, and as the sleeve is cone shaped or tapered, as shown, it will make a snug fit and engage therewith. Furthermore, .as the pump as a whole is slidable in the sleeve it may be forced downwardly in the sleeve until the tube 27 engages the bottom of the tank. With the pump inserted, as specified, it is only necessary to grasp the handle 6 and impart a reciprocating movement to the piston or plunger. During the upward stroke a suction is produced causing the oil to enter the notches 28 and the pump cylinder through the check valve 20, as this is lifted during suction action. During reverse movement of the plunger the liquid is compressed and as such v. v causes seating of the check valve 20' and at the same time forces the check valve together .with

the sleeve valve 18 in a downward direction until the same it is best to force the plunger to its lower most position, shown in Figure 1, so as to discharge the remaining oil, such oil is of course forced into the discharge passage formed between' the inner cylinder and tube B and it would leak out unless it is immediately drained. Immediate drainage of any oil from the spout 15 or oil delivered to the discharge passage from the cylinder is obtained in the present instance by providing the drain passages 17. These passages are open at their upper most ends when the sleeve valve assumes the position shown in'Figure 1, that is, the oil in passage 13 enters thefup` per ends of the drain passage 17, as shown b`y arrows b in Figures 1 and 6 and drains out of said passages at their lower ends, as indicated by ari rows c, thus completely draining the discharge passage 13 and preventing leakage and dripping when the pump is not in use or when it is to be transferred from place toplace. Such leakage is not only a nuisance but it causes unnecessary soiling of oors and so forth and in the present instance is entirely avoided by providing the drain sleeve show n. The sleeve 27 permits the lower end of the pump to engage the bottom of the container from which the oil is tobe discharged and it insures complete removal of the contents of the oil in the bottom of the container.` These notches 28 in the lower end of the sleeve are veryi shallow and as such create a suction along the bottom of the container thereby insuring re'- moval of the entire contents.

While certain 'features of the present invention are more or less specifically described, I wish it understood that various changes may be resorted to within the scope of the appended claims. Similarly, that the materials and finish of the several parts employed may be such as the manufacturer may decide, or varying conditions or uses may demand.

Having thus described my invention, what I claim and desire to secure by Letters Patent is l. In a pump of the character described an inner and an outer tube, said inner tube forming a pump cylinder and being spaced from the outer tube to form a discharge passage, a piston reciprocally mounted in the cylinder, said pump cylinder being open at its lower end to form an inlet passage and having a plurality of discharge ports formed therein adjacent said inlet end, a check valve cooperating with the inlet end of the cylinder, said valve admitting a fluid to the cylinder during a suction stroke of the piston, and a.A sleeve valve cooperating with the check valve and adapted to uncover the discharge ports during a discharge stroke of the piston.

2. In a pump of the character described an inner and an outer tube, said inner tube forming a pump cylinder and being spaced from the outer tube to form a discharge passage, a piston reciprocally mounted in the cylinder, said pump cylinder being open at its lower end to form an inlet passage and having a plurality of discharge portsrforme'd therein adjacent said inlet end, a check yvalve cooperating with the inlet end of the cylinder, said valve admitting a uid to the cylinder during a suction stroke of the piston, a sleeve valve cooperating with the check valve and adapted to uncover the discharge ports during a discharge stroke of the piston, and a sleeve interposed between the pump cylinder and the outer tube and forming a guide for the sleeve valve, said sleeve having a plurality of drain passages formed therein which are adapted to be covered or uncovered by the sleeve valve.

3. In a pump of the character described a pump cylinder said cylinder being open at its lower end to form an inlet passage and having a plurality of discharge openings formed therein adjacent said inlet passage, a spring`l actuated reciprocal sleeve valve slidably mounted on the lower end of the cylinder and normally forming a closure for the discharge ports, a check valve carriedby the sleeve valve and normally forming a closure for the inlet end of the cylinder, a piston in the cylinder, and means for imparting a reciprocal movement thereto whereby the check valve is opened during a suction stroke of the piston to admit a fluid to the cylinder and the check valve closed and the sleeve valve depressed to uncover the discharge ports during aA discharge stroke of the piston.

4. In a pump of the character described a pump cylinder, said cylinder being open at its lower end to form an inlet passage and having a plurality of discharge openings formed therein adjacent said inlet passage, a spring actuated reciprocal sleeve valve slidably mounted on the lower end of the cylinder and normally forming a closure for the discharge ports, a check valve carried by the sleeve valve and normally forming a closure for the inlet end of the cylinder, a piston in the cylinder, means for imparting a reciprocal movement thereto whereby the check valve is opened during a suction stroke of the piston to admit a uid to the cylinder and the check valve vclosed and the sleeve valve depressed to uncover the discharge ports during a discharge stroke of the piston, a tube surrounding the cylinder and spaced therefrom to lform a discharge passage, said passage communicating with the discharge ports in the cylinder, and a discharge spout on said tube.

5. In a pump of the character described a pump cylinder, said cylinder being open at its lower end to form an inlet passage and having a plurality of discharge openings formed therein adjacent said inlet passage, a spring actuated reciprocal sleeve valve slidably mounted on the lower end of the cylinder and normally forming a. closure for the discharge ports, a check valve carried by the sleeve valve and normally forming a closure for the inlet end of the cylinder, a piston in the cylinder, means for imparting a reciprocal movement thereto whereby the check valve is opened during a suction stroke of the piston to admit a fluid to the cylinder and the check valve closed and the sleeve valve depressed to uncover the discharge ports during a discharge stroke of the piston, a tube surrounding the cylinder and spaced therefrom to form a discharge passage, said passage communicating with the discharge ports in the cylinder, a discharge spout on said tube, and means controlled by the sleeve valve for draining fluid from said discharge passage.

6. In a pump of the character described, a cylinder, a reciprocal piston therein, said cylinder having ports adjacent one end, a slidable sleeve forming a closure for said end and normally closing said ports, and a check valve in the end of said sleeve, whereby a suction 4stroke of the piston will open the check valve and a pressure stroke of the piston Will close the check valve and cause the sleeve to slide away from said ports.

7. In a pump of the character described, a cylinder, a reciprocal piston therein, said cylinder having ports adjacent one end, a slidable sleeve forming a closure for said end and normally closing said ports, a check valve in the end of said sleeve, whereby a pressure stroke of the piston will close the check valve and cause the sleeve to slide away from said ports, and resilient means normally urging said sleeve to a closed position over said ports.

8. In a pump of the character described, a cylinder having discharge ports formed therein, a discharge tube surrounding the cylinder, a sleeve slidably mounted on the cylinder to open and close said ports, and a second sleeve surrounding the first sleeve and having slots formed therein whereby uid in the vdischarge tube will drain out of the tube when said rst sleeve is in` a position to close said ports.

9. In a pump of the character described, a cylinder having discharge ports formed therein, a sleeve valve surrounding the cylinder to control uid passage through said ports, a discharge tube surrounding the cylinder and sleeve valve, and a sleeve disposed between the sleeve valve and discharge tube and having drain ports formed therein, said sleeve valve being operable upon movement in one direction to open the discharge ports and close the drain ports and upon movement in the other direction to open the drain ports and close the discharge ports.

10. In a pump of the character described, a cylinder having discharge ports formed therein, a sleeve valve surrounding the cylinder to control fluid passage through said ports, a discharge tube surrounding the cylinder and sleeve valve, and a sleeve disposed between the sleeve valve and discharge tube and having drain ports formed therein, said sleeve Valve closing the drain ports when the discharge ports are open and closing 105 the discharge ports when the drain ports are open.

11. In a pump of the character described, a cylinder having discharge ports formed therein,

a sleeve valve surrounding the cylinder and mov- 110 able to and away from said ports to close and open them, a discharge chamber surrounding the cylinder and sleeve valve, a sleeve disposed between the discharge chamber and sleeve valve and having drain ports formed therein, said 115 sleeve valve normally closing the discharge openings and permitting iluid ow through the drain ports, said sleeve valve being operable to close the drain ports when it is moved to open the discharge openings.

HENRY A. WEICHHART. 

